Maintenance
03.00|1341130_ROTA NCR-A |en
39
From chuck size 250:
•
If present, remove top jaws.
•
Remove screws (item 39) and take off the cover (item 34).
•
Remove screws (item 58) and the covering strips (items 15/16).
•
Take the seal (item 22) along the base jaw out of the groove.
•
Remove the screws (item 61) and take off the mount (item 7).
The mount (item 7) can be pushed off the chuck body (item 1)
from the rear with the suitable screws (screws not included in
the scope of delivery)
•
Remove screws (item 20) and take the cover plates (item 18)
out of the chuck body.
•
Remove the seals (items 22/17)
•
Remove the six levers (item 6) together with the bearing seat
(item 8) from the chuck body. To do this, there is a bore hole on
the side of the bearing seat in which a removal tool can be
inserted.
•
Remove the six base jaws (item 2) radially outwards (size 250:
inwards) and push the piston (item 3) out of the chuck body
(item 1).
•
Degrease and clean all parts and check them for damage or
wear.
Only use genuine SCHUNK spare parts when replacing damaged
parts.
Before assembly, grease well with LINOMAX plus special grease
paste.
The lathe chuck is assembled in the same way but in the reverse
order.
During assembly, the following must be observed in particular:
•
The piston has a point marking on the front side. This is
assigned to base jaw guide 1 during assembly.
•
The bore hole on the side of the bearing seat (item 8) must
point in the direction of the mount.
•
Scraper strips (items 15/16) may only be placed lightly on the
base jaws (item 2). Free movement must be ensured.
•
For mounting the seal along the base jaw, using the optional
assembly tool (ID: 1384194) is recommended. The seal should
not be stretched during the assembly process.